Get ClientCertStore through ResourceContext.

net/ssl/client_cert_store_impl_nss.cc

Index: net/ssl/client_cert_store_impl_nss.cc
diff --git a/net/ssl/client_cert_store_impl_nss.cc b/net/ssl/client_cert_store_impl_nss.cc
index ffab2680c68d7520a5cc5453706ad03b85fd1904..f41f404f8b78cd5f45bad2c795e2bbab384cd211 100644
--- a/net/ssl/client_cert_store_impl_nss.cc
+++ b/net/ssl/client_cert_store_impl_nss.cc
@@ -7,6 +7,7 @@
 #include <nss.h>
 #include <ssl.h>
 
+#include "base/callback.h"
 #include "base/logging.h"
 #include "net/cert/x509_util.h"
 
@@ -77,18 +78,22 @@ bool GetClientCertsImpl(CERTCertList* cert_list,
 
 }  // namespace
 
-bool ClientCertStoreImpl::GetClientCerts(const SSLCertRequestInfo& request,
-                                         CertificateList* selected_certs) {
+void ClientCertStoreImpl::GetClientCerts(const SSLCertRequestInfo& request,
+                                         CertificateList* selected_certs,
+                                         const base::Closure& callback) {
   CERTCertList* client_certs = CERT_FindUserCertsByUsage(
       CERT_GetDefaultCertDB(), certUsageSSLClient,
       PR_FALSE, PR_FALSE, NULL);
   // It is ok for a user not to have any client certs.
-  if (!client_certs)
-    return true;
+  if (!client_certs) {
+    selected_certs->clear();
+    callback.Run();
+    return;
+  }
 
-  bool rv = GetClientCertsImpl(client_certs, request, true, selected_certs);
+  GetClientCertsImpl(client_certs, request, true, selected_certs);
   CERT_DestroyCertList(client_certs);
-  return rv;
+  callback.Run();
 }
 
 bool ClientCertStoreImpl::SelectClientCertsForTesting(